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. Author manuscript; available in PMC: 2016 Jun 5.
Published in final edited form as: Chem Biol Interact. 2014 Dec 31;234:339–348. doi: 10.1016/j.cbi.2014.12.015

Scheme 1.

Scheme 1

General synthetic procedure. Reagents i): NaH, PhMe, 3,3-dimethylallyl bromide; ii): RCl, NEt3, DMAP, DCM; iii): H2C=CHCO2tBu, Pd(OAc)2, (Ph)3P, NEt3, PhMe; iv): SiO2, PhMe.